Improvement in steam-generators



H. M. HUAGKENBUSH.

Steam-Generators.

No. 145,682 Patented Dec. 16,1873.

Masses.

UNITED STATES PATENT OFFICE.

HENRY M. QUAOKENBUSH, OF HERKIMER, NEW YORK.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of Letters Patent No. 145,682, dated December 16, 1873 application filed November 1, 1873.

To all whomc't may concern Be it known that l, HENRY M. QUAOKEN- BUSH, of Herkimer, in the county of Herkimer and State of New York, have invented certain Improvements in Steam-Generators, of which the following is a specification:

Figure 1 is a vertical central section of my 'improved steam-generator; Fig. 2, a bottom view, partly insection, of the same.

Similar letters of reference indicate corresponding parts in both figures.

The object of this invention is to produce a boiler or steam-generator in which constant circulation of the liquid to be heated is obtained, and in which the labor of attending to the fuel may be reduced. My invention consists in combinin g with an annular steam-an d-water chamber, having a central fuel-reservoir, a series of downwardly-projecting pipes which surround the central fire-place, and whose upper ends communicate with the lower part of the said water-andsteam chamber. The pendent pipes, having each one branch or arm near the fire and the other farther away from the same, tend, by the varying heat which is applied to such arms or branches, to invite and produce circulation, and thus to bring the colder water always into the most heated part of the pipes, facilitating and hastening the process of heatmg.

In the accompanying drawing, the letter A represents the annular steam-and-water chamber, constituting the main part of my generator. It is made of suitable size and form and built either into brick-work or masonry of suitable kind, or jacketed, to preserve the heat. From the bottom of the chamber A are suspended around the central fire-space, a series of U-shaped pipes, B B, which are arranged in one or more circular rows, as indicated in Fig. 2, and which, with their upper ends, are in full and unrestrained communication with the chamber A, so that they will all be filled with water, if that liquid should be in the chamber A to or below the height of the waterline. The grate O is built about in line with the lower part of the U-shaped pipes B, and is embraced by the same, and fuel is supplied to the grate from above, through a pipe, D, which is introduced in the center of the annular chamber A, in the manner clearly shown, so that thus the apparatus is base-burning. A sheet-metal plate, E, is, by preference, arranged around the fire-place, and between the inner arms a and the outer arms I) of the U -pipes B, as shown, so as to confine the heat more to the inner branch a and leave the outer branches 1) proportionately cooler. This will, of course, cause the liquid in the branches a to ascend,

because it is the most heated, and that in b to descend, because the coolest. A complete and continuous circulation is thus obtained.

Instead of making the pipes U-shaped, as shown, they may be of other equivalent form, and the two branches of each pipe may even be disconnected at the lower ends, in which case circulation will be less complete, but will still be efiected. The sheet-metal plate E also serves to regulate the draft, and may be adj ustable up and down, in order to increase or reduce the draft. Y

I claim as my invention- 1. The annular steam-and-water chamber A,

J. A. CLARK, A. V. BRIEsEN. 

